[loeg]

Do you poweroff your backup HDDs for extended periods of time (months+)? That's a relatively infrequent backup interval. If not, the poweroff issue isn't relevant to you.

(More relevant might be that backups are a largely sequential workload and HDDs are still marginally cheaper per TB than QLC flash.)

[everdrive]

Yes, I try to backup once per month but I'm not always very regular about it. Multiple months are not uncommon for me.